grin and bear it

To grin and bear it means to endure something unpleasant but in good humor or with a positive attitude. If you are grinning and bearing something, you are aware of how unpleasant it is, but for one reason or another, but still deal with it and endure this situation. For this reason, you will grin as you endure the crisis and bear it, hopefully with a smile on your face, but at least deal with it until it is over.